TSNN — the TV-System for Navigation and Guidance — is being developed for solving housekeeping and scientific tasks including:

navigation in the near-planetary space based on images of Mars, Phobos and the starry sky;

Phobos high resolution imaging;

determination of the SC altitude as well as the vertical and horizontal velocities at the stage of landing to Phobos.

TSNN consists of two television cameras and a powerful data processing computer.

Main Characteristics of TV-cameras

Narrow-Wide-angleangle

Focal length, mm50018

Photoreceiver typeCCD array

Angular field of view, deg2.432.4

Mass, kg2.81.5

Power consumption, W77

Number of TV-cameras22

KNM — Mars Observation Camera — is being designed as the scientific instrument of the Phobos-Grunt mission. The data acquired with this camera will be used for long-term monitoring of the Red Planet's surface and atmosphere: seasonal and diurnal variations of the surface and climatic processes, polar cap boundary dynamics, dust storms, clouds, atmosphere composition analysis with limb observations.

Imaging is controlled from the Earth. The data is transmitted after preliminary compression. Technical parameters are under consideration.